Fix the acceptance tests after the merger of #279 (#443)

* Enable acceptance tests

* Fix the acceptance tests

* Move `--headless` from `getDefaultCommandArgs` to `getDefaultTapCommandArgs`

* Fix rest of the failing acceptance tests

* Revert "Enable acceptance tests"

This reverts commit 3f919e865a.

* Revert "Revert "Enable acceptance tests""

This reverts commit c0bfe54b70.

* Ignore `--headless` in `mizu view`

* Make all non-informative things informative

* Remove `github.com/stretchr/testify` dependency from the acceptance tests

* Move the helper methods `waitTimeout` and `checkDBHasEntries` from `tap_test.go` to `testsUtils.go`

* Split `checkDBHasEntries` method into `getDBEntries` and `assertEntriesAtLeast` methods

* Revert "Revert "Revert "Enable acceptance tests"""

This reverts commit c13342671c.

* Revert "Revert "Revert "Revert "Enable acceptance tests""""

This reverts commit 0f8c436926.

* Make `getDBEntries` and `checkEntriesAtLeast` methods return errors instead

* Revert "Revert "Revert "Revert "Revert "Enable acceptance tests"""""

This reverts commit 643fdde009.

cli/cmd/tap.go

@@ -113,4 +113,5 @@ func init() {
 	tapCmd.Flags().String(configStructs.EnforcePolicyFile, defaultTapConfig.EnforcePolicyFile, "Yaml file path with policy rules")
 	tapCmd.Flags().String(configStructs.ContractFile, defaultTapConfig.ContractFile, "OAS/Swagger file to validate to monitor the contracts")
 	tapCmd.Flags().Bool(configStructs.DaemonModeTapName, defaultTapConfig.DaemonMode, "Run mizu in daemon mode, detached from the cli")
+	tapCmd.Flags().Bool(configStructs.HeadlessMode, defaultTapConfig.HeadlessMode, "Enable headless mode.")
 }

cli/cmd/tapRunner.go

@@ -4,16 +4,17 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"github.com/up9inc/mizu/cli/cmd/goUtils"
 	"io/ioutil"
-	k8serrors "k8s.io/apimachinery/pkg/api/errors"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/apimachinery/pkg/util/wait"
 	"path"
 	"regexp"
 	"strings"
 	"time"
 
+	"github.com/up9inc/mizu/cli/cmd/goUtils"
+	k8serrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/wait"
+
 	"github.com/getkin/kin-openapi/openapi3"
 	"github.com/up9inc/mizu/cli/apiserver"
 	"github.com/up9inc/mizu/cli/config"
@@ -625,7 +626,9 @@ func watchApiServerPod(ctx context.Context, kubernetesProvider *kubernetes.Provi
 				}
 
 				logger.Log.Infof("Mizu is available at %s\n", url)
-				uiUtils.OpenBrowser(url)
+				if !config.Config.Tap.HeadlessMode {
+					uiUtils.OpenBrowser(url)
+				}
 				if err := apiProvider.ReportTappedPods(state.tapperSyncer.CurrentlyTappedPods); err != nil {
 					logger.Log.Debugf("[Error] failed update tapped pods %v", err)
 				}

cli/config/configStructs/tapConfig.go

@@ -3,9 +3,10 @@ package configStructs
 import (
 	"errors"
 	"fmt"
-	"github.com/up9inc/mizu/shared"
 	"regexp"
 
+	"github.com/up9inc/mizu/shared"
+
 	"github.com/up9inc/mizu/shared/units"
 )
 
@@ -22,6 +23,7 @@ const (
 	EnforcePolicyFile             = "traffic-validation-file"
 	ContractFile                  = "contract"
 	DaemonModeTapName             = "daemon"
+	HeadlessMode                  = "headless"
 )
 
 type TapConfig struct {
@@ -44,6 +46,7 @@ type TapConfig struct {
 	ApiServerResources     shared.Resources `yaml:"api-server-resources"`
 	TapperResources        shared.Resources `yaml:"tapper-resources"`
 	DaemonMode             bool             `yaml:"daemon" default:"false"`
+	HeadlessMode           bool             `yaml:"headless" default:"false"`
 }
 
 func (config *TapConfig) PodRegex() *regexp.Regexp {